Half-Life: Resonance Cascade is a full conversion modification for SCP: Containment Breach based on Half-Life game series. This mod serves as a depiction of the Black Mesa Incident from a seperate, farther off perspective.

You, Dr. Ben Walker, Clearance Level 4, have been assigned to test on BMR-500, a robot that displays extreme hostility, but is fortunately only able to move while outside direct observation. Midway into the testing session, you hear the alarm and the scientists say they have it under control and it's not much of a problem. Turns out it is, as the electricity shuts down and the robot kills your buddies and the guard. Sector C Personnel have been ordered to evacuate the area until further notice. How far will you go to get to the surface?

- Ported on SCP: CB v1.3.11. (Note: the source code has been rewritten due to the big difference with v1.3.7, so some additions from previous HL:RC versions have been cut.)
- New models for BMR-500 (SCP-173), HEV Subjects, "Otis" guard, Metrocops (from SCP-1123 event) and Black Ops.
- The vest changed to HEV Suit + removed PCV model and some other unused items.
- The voice lines of HECU Marines (except for endings) reverted back to Half-Life ones + rechanged announcements for the intercom.
- New texture for locking devices.
- Rechanged some outputs from SCP-914.
- The number of slots in the inventory has been increased from 10 to 15.
- Added new sounds for some items.

With some help from Mleczyk76 (thanks :3):

- SCP-1499-1 specimens replaced as Antlions.
- (Finally!) Fixed the road in Gate A and Gate B surfaces (it uses a new texture instead of standard "concretefloor").
- The "Barney" guard model has been updated in accordance with new animations.

New additions from Ultimate Edition and more:

- The HEV Suit now has an armor scale, which can be restored by using HEV Batteries (based both on the "kevlar" bar from NTF Mod and SCP-1033-RU).
- New & improved models for the containment chambers of SCP-008, SCP-009, SCP-409, SCP-457 and SCP-106.
- Added a "corpse-with-radio" event in "room4info" (with a special easter egg).
- Added the loader (uses the code of a truck from v5.5) in the intro room.
- New monster in "room2testroom" (based on SCP-682 from Redbull.Ivan's "Story of Site" mod).